Improvement in breast-pumps



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Be it known that I, WILLIAM TQFRY, of the city, county, and State of NewYork, have invented certain Improvements in'Breast-Pumps;and doherebydeclare the-following to be a `full, clear, and exact descriptionofthe same.

My invention consists of a breast-pump, which is simple in itsconstruction, ecient in its operation, and v maybe applied without -painto the breast.

In `order to enable others skilled n the art to make and use myinvention, I will now proceed to describe its construction andoperation, reference bein'g had tothe accompanying drawing, which formsa part of-this specification, and iu which- Figure 1 is a longitudinalsection of my improved breast-pump.

Figure 2, a detached view of part of the pump, drawn to an enlargedscale.

A is a circular vessel, of glass or other material, the opposite sidesof which are slightly flattened, as shown in the drawing.V From thecentre of one side of the vessel projects, a neck, a, having a flange orrib, c, near its outer edge, and at the opposite side of thevessel is ahollowprojection, a', to which is tted a valve-case, B.'-

From the centre of the valve-case Bprojects a tube, which communicateswith the interior of the' valve-case and'with the-vessel A, the upperend of :the tube being adjacent to an opening, f, in the edge of thevessel A. One end of a rubbertube, d, is drawn over the neck a, and, bycontracting on the latter, at the rear of the ilange c, is securelyfastened in its place. .At one end of an oval elastic vessel, D, is avalve-case, Bl,'and at theopposite end of the vessel is a iiexibl'e liporiange, 7i, which maybeexpanded so as to enclose thevalve-case B, as'shown in iig'. 1. Each valve-case consists of a cap, m, 'havingexternal screw-threads adapted -to those at the interior of a screw-cap,n, and between thetops ofthe caps 1s suiiicient space to permit a rubberdisk or valve,

s, to vibratefreel'y. In the centre of the' top of the cap m is anopening, e, and 'in the top of 'the cap n, near.`

the opposite sides, are, openings, z' z. v l v Owing to the arrangementof the casings andtheir valves, the air will beex'pelled'throughthe`caseB from the vesselD, when the `latter is compressed, and will bedrawn from theves'sel A into lthe'said vessel D, when it resumes itsshape. After passing the flange h over'the valve-caseB,-as shown in fig.1, the lvessel A is turned so that the opening f shall be uppermost,andthe end f 'the ile'xible tube d is applied to the breast, V thevessel A being so, held iny one hand that the opening f mayA becoveredbyl'the thumb, or one of the fingers, while the vessel -D is grasped bythe other hand. The vessel D is now alternately compressed'andreleased,when the air. within the vessel A will be withdrawn, and themilk will be caused to flow into the vessel, the tube b preventing themilk from gaining access to the valve-case, without interfering with thepassage of air from one vessel to the other. Should the pressure upon'the breast become painful, it may be instantly removed byuncovering theopening f.' As the tube'cl is soft andy exible at its end, it will adaptitself to the breast, and will t closely, without the necessity ofapplying-any painful'pressure to prevent 'the access of air. Owing tothe arrangement of thc vibrating valve s, between the twocaps m n, suchan eeetual opening and closing of `the-airpassa.ges Ais obtained 'thatthe air in the vessels may be readilyl withdrawn, while-any injuriousleakage, or the possibility of the valves getting out of order, iseffectually prevented. By dtaching the tube d, access may be had .to theinterior of the vessel A, when it is necessary to clean the same, Atherib-c eiectunlly preventing the tube from slipping'froin its place,without interfering with' its ready removal when required.

As the vessel A will form the subject of another application for LettersPatent, I make kno claim `to the samefhere'; but claim as my invention,and desire to secure by Letters Patent i i 1. The tube d, iexible at itsouter en d, in combination with a receiving-vessel, A, and with avessel, D, or

equivalent device, for exhausting the air from the vessel A,substantially as and for the purpose described.A

2. The `valve-case `B, consisting of detachable caps m n, with theiropenings, e`1f,and the vibrating disk s,

,the whole being constructed and arranged substantially asspeciiied.v

-In testimony whereof I have signed my name to this specification in thepresence'oiltwyo subscribing witnesses.

` f wM."r. rnv.

i Witnesses:

CHARLES -E.,Fosrnn, W. J. R. DELANY.

